How can I make a Validation Try and Except Error for this?

Question

I have this code as shown below and I would like to make a function which has a try and except error which makes it so when you input anything other than 1, 2 or 3 it will make you re input it. Below is the line which asks you for your age.

    Age = input("What is your age? 1, 2 or 3: ")

Below this is what I have so far to try and achieve what I want.

   def Age_inputter(prompt=' '):
        while True:
            try:
                return int(input(prompt))
            except ValueError:
                print("Not a valid input (an integer is expected)")

any ideas?

This may be useful to you: [Asking the user for input until they give a valid response](http://stackoverflow.com/q/23294658/953482) — Kevin, Nov 24 '15 at 20:45

score 0 · Answer 1 · answered Nov 24 '15 at 20:46

add a check before return then raise if check fails:

def Age_inputter(prompt=' '):
        while True:
            try:
                age = int(input(prompt))
                if age not in [1,2,3]: raise ValueError
                return age
            except ValueError:
                print("Not a valid input (an integer is expected)")

Damián Montenegro · Answer 2 · 2015-11-25T15:05:16.060

0

This may work:

def Age_inputter(prompt=' '):
    while True:
        try:
            input_age = int(input(prompt))
            if input_age not in [1, 2, 3]:
                # ask the user to input his age again...
                print 'Not a valid input (1, 2 or 3 is expected)'
                continue
            return input_age
        except (ValueError, NameError):
            print 'Not a valid input (an integer is expected)'

edited Nov 25 '15 at 15:05

answered Nov 24 '15 at 20:47

Damián Montenegro

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How do I link this to the Age = input("What is your age? 1, 2 or 3: ") so it works? – EDoggyDog Nov 24 '15 at 21:29
@EDoggyDog, you just need to write Age = Age_inputter('What is your age? 1, 2 or 3: ') – Damián Montenegro Nov 25 '15 at 15:09

How can I make a Validation Try and Except Error for this?

2 Answers2